Null pointer exception for file in test/resource

Question

Project Structure

/spp-test-automation
  /src
    /main
    /test
      /java
        /com.testing.tool
          Processor.java
      /resources
        processor.json

Within Processor.java I am trying to grab the contents in my processor.json file. However, I am getting a NullPointerException and I am not sure why.

For the variable filepath, I've tried the values "src/test/resources/procesoosr.json", "processor.json", "\processor.json" but I am still getting a NullPointerException.

BufferedReader bufferedReader = new BufferedReader(new FileReader(filepath));

I have even passing in the absolute path but I get the same error as well.

File file = new File("src/test/resources/processor.json");
String absolutePath = file.getAbsolutePath();

I am using Intellij to run these tests and this is what my config looks like. Ignore the red text and I simply renamed the package but the concept is essentially the same

Does this answer your question? [Preferred way of loading resources in Java](https://stackoverflow.com/questions/3861989/preferred-way-of-loading-resources-in-java) — Amongalen, Jan 22 '20 at 10:23
What have you tried to spot the error? Usually, with current IDEs, you can use a pretty good debugger — Nico Haase, Jan 22 '20 at 13:23

score 1 · Answer 1 · answered Jan 22 '20 at 10:39

Try adding a dot before src to to indicate that you are using the relative path to the project root directory. Otherwise you will search by absolute path.

File file = new File("./src/test/resources/processor.json");
String absolutePath = file.getAbsolutePath();

score 0 · Answer 2 · answered Jan 22 '20 at 10:40

0

Use

    ClassLoader classLoader = new ReadResourceFileDemo().getClass().getClassLoader();
    File file = new File(classLoader.getResource(fileName).getFile());

where fileName="processor.json"

answered Jan 22 '20 at 10:40

AbrA

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1
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score 0 · Answer 3 · answered Jan 22 '20 at 10:46

to start: right click on the file : choose Copy path: there are 3 paths:

Absolute path
Content root path
Source root path

usually is content root path. After test with those paths

BufferedReader bufferedReader = new BufferedReader(new FileReader(path));

Null pointer exception for file in test/resource

3 Answers3